#ifndef STUDENTC_H_
#define STUDENTC_H_


#include <iostream>
#include <string>
#include <valarray>

class Student
{
private:
    typedef std::valarray<double> ArrayDb;
    
    std::string name;
    ArrayDb scores;

    std::ostream & arr_out(std::ostream & os) const;

public:
    Student(): name("NULL Student"), scores() {}
    // 单参构造函数，可能被用于隐式类型转换
    explicit Student(const std::string & s): name(s), scores() {}
    explicit Student(int n): name("NULLY"), scores(n) {}
    Student(const std::string & s, int n): name(s), scores(n) {}
    Student(const std::string & s, const ArrayDb & a): name(s), scores(a) {}
    Student(const char * str, const double * pd, int n): name(str), scores(pd, n) {}

    ~Student() {};

    double Average() const;
    const std::string & Name() const;
    double & operator[](int i);
    double operator[](int i) const;

    // friend
    friend std::istream & operator>>(std::istream & is, Student & stu);
    friend std::istream & getline(std::istream & is, Student & stu);
    friend std::ostream & operator<<(std::ostream & os, const Student & stu);
};


#endif